Dental tool



March 25 19245; 1,487,776

' ,J. GCLVDBERG DENTAL 'ro'oL Filed Dep. 5. 1922 IrwerzZor-s JcobGoldberg,

Patented Mar. 25, 19.24.

JACOB GOLDBERG, OF PHILADELPHIA, PENNSYLVNA, ASG-NOR OF ONE-HALF TOABRAHAIy-I KOLSKY, OF PHLADELPHIA, PENNSYLVANIA.

DENTAL TOOL.

Application filed December 5, 1922. Serial No. 605,005.

To all whom t may concern.'

Be it known that l, JACOB GOLDBERG, a citizen of the United States,residing at Philadelphia, in the county of philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inDental Tools, of which the following is a specification.

My invention relates to dental tools, and more specifically to atooldesigned for use by dentists for conforming or fitting a crown in closerelationship to the neck of a tooth. My invention further contemplatesthe provision of a tool of such character that the crown adjustingdevices may be removed from the tool, and crown slitting devicessubstituted in place thereof.

lt is well known to dentists that it is difficult to properly fit goldor similar metallic crowns to a tooth for the reason that the crown ofthe natural tooth is ordinarily larger than the neck portion, andconsequently, when the crown is so shaped as to tit over the enlargedportion of the tooth, a space will usually be left at the cervicalmargin of the crown which will permit the entrance of particles of foodand other deleterious substances, causing further decay of the tooth andsubsequent loosening of the crown therefrom. It will therefore be unvderstood that it is essential that the crown be tightly fitted aroundthe neck of the tooth for the foregoing reasons, as well also forpresenting a more sightly appearance.

The object, therefore, of my present invention is to provide a simpleand eihcient tool whereby the crown may be tightly conformed to orfitted around the neck of the tooth in a convenient and expeditiousmanner byl the dentist. A further object of my invention is to provide atool of such character that the crown adjusting members may be removedtherefrom, and crown adjusting members substituted in place thereof. A.further object of my invention is to so shape the operating jaws of thetool (which jaws carry the crown adjusting members, or alternatively,the crown slitting members) in such manner as to afford the utmostconvenience and facility during the various manipulations required, andcausing a miniinum'of discomfort and annoyance to the patient.

The nature and characteristic features of my invention will-be morereadily underlthe tool, this view also illustrating certain opencondition injjuxtaposition to a tooth having a crown mounted thereonwhich is to be adjusted thereto;

Fig. 2 is a front elevation of the tool, the parts being shown in closedcondition to more clearly illustrate certain details of construction; y

Fig. 3 is a side elevation of a portion of details of construction;

Fig. 4L is a perspective view of one of the crown adjusting membersdetached from the tool proper;

Fig. 5 is an end elevation of the tool with the crown slitting membersmounted in place therein, the'same also being shown inV operativerelationship with respect to a tooth having a crown mounted thereonwhich is to be slit or cut for the purpose of removing the same from thetooth; and

Fig. 6 is an underneath plan view of the tool with the crown slittingmembers mounted therein, the tool being shown in closed condition.

Referring to the drawings, in the particular embodimentvof my inventiontherein shown, the tool proper comprises a plierlike structurecomprising two members 9 pivoted together as at 10, each of said members9 having a handle portion 11, to which handle portions 11 there aresecured spring members` 12 and 13 which interlock with each other attheir free ends, as at 14, the springs 12 and 13 tending to normallysep-V arate the handle portions 11. Each of the members 9 comprising theplier-like structure is provided with an operating jaw 15, each of whichjaws 15 has a portion 16 extending angularly downward, forward andoutwardV with respect to the members 9. The angular relationship of theportion 16 of each of the operating jaws 15 will be more readilyunderstood by reference to Figs. 1. 2 and 3 of the drawings.

Each of the angularly projecting members 16 of the operating jaws`15 isprovided with a recess 17 for the reception of a Y stud 18 of the crownadjusting member 19. The stud 18 of the crown adjusting member 19 isadapted to be held in place by means of a screw 2O threaded in theportion 16 of the jaw 15. rfhe crown adjusting member 19 is providedwith an extending portion 21 having an opera ing` which is preferablymade slightly curved inwardly (see Fig. it), and with its endsprojecting to the front and rear, as at 255, from the main body portionof said member 19. workingsurface 22 of the crown adjusting member 19 ismade relatively narrow so that a greater pressure may be obtained at theproper pinces than would be the case if these surfaces were of graterwidth.

By loosening' the screws 20, the crown adjusting iiemiers 19 may beremoved from the ends of the operating aws, and in place thereof theremay be inserted the crown slitting members illustrated in operativeposition in Figs. and 6 of the drawings. The crown slitting' devices cogri a ineinber 25 having roughened surface 25 adapted to engage the topportion of the crown, this device being mounted in one of the extensions16 of one of the operatingjaws 15, while in the ctension i6 of the otheroperating jaw 153 there is mounted a cutting tool 27 having a sharpenededge 28 terminatinggl in a point f being' understood that the crownslittingl icinbers 25 and 27 are each provided with studs similar to thestuds 18 of the crown adjusting members 19, for the purpose of securingthe same in the operating,` jaws of the plierlike structure by means ofthe screws 2O hereinbefore referred to.

The operation of the device will be readily understood. The plier-likestructure having the crown adjusting members 19 mounted in placetherein, and the crown being placed over the tooth. the narrow curvedworking surfaces 22 of the crown adjusting members are brought incontact with the crown at successive places at or near the cervicalmargin thereof, and by compression of the handles the crown will therebybe compressed and formed around the noch of the tooth, vthus insuring` atightly fitted crown and reducing to a minimum the likelihood of theentrance of food particles and other deleterious substances under thecrown, which would'cause decay or result in loosening of the crown fromany other cause. The conformation of the crown adjusting members willordinarily permit the same to be brought in contact with. all portionsof the crown as may be required, and the angular arrangement of theprojecting ends of the operating jaws will greatly facilitate theoperation. Furthermore, by the provision of the interchangable crownslitting members7 the tool will be adaptable aswell for removing oldcrowns from the teeth when necessary.

Having` thus described the nature and rlie features of my invention, i-laiin as neuv and desire to secure letters atent is:

denial tool comprising a plier-like Turc composed o f two memberspivoted r, each of said pivoted members havope rating jaw provided withan in-l ortion enter j.: angilarly downforward from the point of pivotalconnection, the ends of said jaws di- 'to each otherA` and crown arriedat the ends of nis of the operating s'tinn members each ir .ils

.row curved working ace.

A dental tool comprising a plier-like structure composed of two memberspivoter t y each of said pivoted embers havan opor ating' jaw provided:Sith an intel portion extending angulariy downand forward, the ends ofsaid jaws di- D with respect to each other, crown members carried at theends of rejecting pmans of the operating` i A'"-ieans for i onovablysecui'- said ' members in said projecting` operating jaws. said crown o;members cach having relatiif'ely rrow curved working` surface and eachhai-5i1 its ends projecting to the front and rear thc proj ectinke`portions of the operatine in which itis secured.

si dent-al tool comprising a plier-like structure composed of twomembers pivoted together, each of said pivoted members havinniairoperatingv jaw provided with an inteeral portion extending angularlydownward anc forward, the ends of said jaws diy with respect to eachother, crown adjusting' members carried at the ends of said projectinn`portions of the operatingr jaws, means for removably securing" saidcrown adjustingmembers in said projecting portions of saidoperatingjaws7 and crown slitting` members adapted to be alternativelymounted and secured in the ends of said projectingv portions of theoperatingjaws in place of said crown adjusting members,

el ri. dental tool comprisinga plier-like structure composed oftwomembers pivoted togetherw each of said pivoted members havingr` anoperating jaw provided with an integral portion extendinjcrangularlydownward and forward, the ends of said jaws diverginir with respect toeach other7 crown adj u sting' members carried at the ends of saidprojecting portions of the operating' jaws, means for removablysecuring.; said crown adjustine` members in said projecting portions ofsaid operating* jaws, said crown` adjusting members each havingarelatively narrow curved working surface and each having its endsprojecting to the front and rear of the projecting portions of theoperating jaw in which it is secured, and crown slitting members adaptedto be alternatively mounted and secured in the ends'ot said projectingportions or" the operating jaws in place of said Crown ad'ustingmembers.

5. A dental tool comprisinor a plier-like structure composed or" twomembers pivoted together, each or" said pivoted members having anoperating jaw provided with a portion extending angularly downward,forward and outward. crown adjusting members carried at Jthe ends ofsaid projecting portions or' the operating jaws, means for removablyYsecuring said crown adjusting members in said projecting portions ofsaid operating jaws`v said crown adjusting members each haring arelatively narrow curved working surface and each having its endsprojecting to the front and rear of the projeoting portions of theoperating jaw in which it is secured, and crown slitting members adaptedto be alterna-tively mounted and secured in the ends of said projectingportions of the operating jaws in place of aid Crown adjusting members,said crown slitting members comprising a member having a roughenedsurface adapted to engage the top portion of the crown and a memberhaving a sharpened edge terminating in a point adapted to slit thecrown.

6. A dental tool comprising a, plier-like structure composed of twomembers pivoted together and having handle portions, springi memberscarried by said vhandle portions adapted to normally maintain thepivoted members in open position, each of said pivoted members having anoperating jaw provided with a portion extending angularly lownward,forward and outward, crown ad justing members carried at the ends ofsaid projecting portions of the operating jaws, means for removablysecuring said crown adjusting members in said projecting portions ofsaid operating` jaws, said Crown adiusting members each having arelatively narrow curved working surface and each having its endsprojecting to the front and rear of the projecting portions of theoperating j aw in which it is secured, and crown slitting membersadapted to be alternatively mounted and secured in the ends of saidprojecting portions of the operating jaws in place of said crownadjusting members, said crown slit-ting members comprising a memberhaving a roughened surface adapted to engage the top portion of thecrown and a member having a sharpened edge terminating in apoint adaptedto slit the crown.

ln testimony whereof, l have hereunto signed my name.

JACOB GOLDBERG.

